Cup shaped rotary brush



R. G. MERTES CUP SHAPED ROTARY BRUSH Oct. 27, 1931.

, Filed July 28Y 1930 2 Sheets-Sheet l Bag/7% f'fffmv @Miva @y Oct. 27, 1931. R, G* MERTES 1,829,665

CUP SHAPED ROTARY BRUSH Filed July 28 1930 2 Sheets-Sheet 2 ENTOR.

jig. f BY Patented Oct. 27, 1931y l.

UNITED STATES PATENT OFFICE ROBERT G'. MERTES, 0]?r CLEVELAND, OHIO, .ASSIGNOR BY MESNE ASSIGNMENTS, T0

THE PITTSBURGH PLATE GLASS COMPANY, OF PITTSBURGH, PENNSYLVANIA, A

CORPORATION 0F PENNSYLVANIA CUP SHAPED ROTARY BRUSH Application mea my 2s,

which will embody many advantageous fea tures over similar brushes now in comercial use.

` It is among the objects of this vinvention t0 provide a cup shaped brush wherein the bristles will be anchored at a' point intermediate vtheir respective ends to thereby strengthen and avoid the partaking of torsion on the part of the individual bristles. It 1s a further object of this invention to provlde a cup'brush which may be adapted to be used `on arbors of various diameters.

It is still a Afurther object of this invention to provide a cup brush which can be quickly and economically constructed and which will possess longer wearing qualities than cup brushes in prior use.

- Other objects more orless ancillary to the foregoin and the manner 'in which all the various o jects are realized will appear in the following detailed description, which considered in'conjunction with the accompanying drawings sets forth the preferred embodiment of the invention.

The illustrated embodiment of the invention comprises a brush composed of disc shaped brush sections having radially extending bristle bodies. The sections are enclosed between external side plates, one of which is of greater diameter than the other and mounted on an axial sleeve or tubular member. The extremities of the tubular member are beaded to form a unitary structure of the 4bristle body, plates and tubular member.

The larger plate has an inwardly flared por' tion which causes the bristle material to take the form of a cup. In the finished brush the bristle body is securely compressed and clamped between the flared wall of the larger plate and the peripheral edge of the smaller plate so as to preclude any movement of the individual bristle members within the confined space of the cup brush.

' In the accompanying drawings:

Figure 1 is a fragmentary perspective view partly in section illustratmg the4 preferred embodiment of the invention;

1930. serial No. 471,304.

Figure 2 is a top plan view of the embodiment illustrated in Figure 1;

Figure 3 is a plan view of one of the disc shaped sections which may be used in the cup brush;

Figurevl is a transverse section o f theview i y shown in Figure 3 Figure 5 is a front elevation of an adaptor for employing the cup brush with arbors of different sizes;

Figure 6 is a transverse section of the view shown in Figure 5. Y

With reference to the drawings,especial ly Figures 1 and 3 there is illustrated therein a preferred form of brush section which I desire to use in my invention. The section A comprises the annular side plates C and C that are mounted inspaced relation and have disposed therebetween the bristle maten rial B. The bristle material B which preferably consists of line wire, tampico, hair or like material is arranged radlally around the peripheryk of the side plates, the lower ends of such material being looped about the wire D and disposed between the plates as shown. Y

The side plates C and C are preferably made up of annular blanks having central apertures to permit the introduction of a sleeve H. The ears or lugs E and E which, as will be noted, are struck out from the mid portion of the annular rings and Aextend inwardly therefrom, the struck out portions leaving 'openings in lthe side plates C and C are assembled 'on thel bristle material the lugs are adapted to extend through the bristle body and enga the outer surface thereof in the correspninopenings of the opposite plate.

he brush sections A are then assembled on the sleeve H between. the external side platt- -F is flared upwardly in its outer portion te extend into or beyond the plane of the in- 1100 ner plate G. As shown this portion extends the rings. When 4securely hold;` the bristle maerial at this point; The bristle material is secured against movement at a second point, namely, between the peripheral edge of the plate G and the flared Wall of the plate F so that between this latter point and the wire D the bristle material will be precluded from partaking of any torsion. The construction of a brush wherein the wires are not permitted to l partake of torsion, greatly prolongs the wearthe plane of ing qualities and life of the cup brush.

The sleeve H may be of any standard di- -ameter desired and can be attached to thel mandrel J by means ofthe interpositioned disc shaped adaptors K, K, which center the cup brush on the mandrel. The adaptors are formed of sheet metal having reinforced edges K and are provided with a central opening of any desired smaller diameter than that of the sleeve H making it possible to use'the brush with several mandrels of dif-A ferent diameters.

Although the foregoing description is nec-k essarily of a detailed character in order' to completely set forth this invention it is to be understood vthat the specific terminology is not intended to be restrictive or confining and it is further understood that various rearrangements of parts and modifications of e structural detail may be resorted to without departing from the scope or spirit of the invention as claimed herein.

extending across the plane of the inner plate and clamping the brush body against the outer edge of the. inner plate,the central i portions of the plates and brush body being secured together in clamped relation.'

4. A cup shaped bristle brush comprising an annular bristle body and inner and outer plates secured in clamping relation against the opposite sides of the said body, the inner plate being a ilat disc of less radius than the outer plate and the brush body, and the outer plate having a fiat central portion substantially coextensive With and parallel td the inner plate and having an outerperipheral portion extending at an vangle to the central portion across and beyond the plane of the inner plate, the brush body extending beyond the plates and being clamped between the inner surface of the outer plate and the annular outer edge of the inner plate. i'

. In testimony whereof I aiix my signature.

' ROBERT G. MERTES.

Having described the invention what ll s claim as new and desire to secure by Letters Patent is:

l. A cup shaped bristle brush comprising a brush body and parallel plates having their central portions clampingly secured together, one plate having a flan e surrounding the other plate and extending atv least to the plane ofthe said other plate and clamping the brush body between said ange and the outer periphery of the other plate.;

2. A cup shaped bristle brush comprising a brush body and inner and. outer plates having their central portion clampingly secured together, the outer plate extending across and in brush-body-supporting position beyond the inner plate, the outer plate lOO llt

iso

clamping and supporting the brush body against the outer peripher of the in ner plate.

3. A cup shaped bristle rush havlng a substantially dat central portion and comprasin oue shaped brush body having a Hat-central portion, and an outer cup shaped plate having a dat central portion and an outer portion a fiat, disc-like innerv plate, an annular iat 

